package com.heima.article.service.impl;

import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.article.mapper.ApArticleContentMapper;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.pojos.ApArticle;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
@Transactional
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {

    @Resource
    private Configuration configuration;
    @Resource
    private FileStorageService fileStorageService;
    @Resource
    private ApArticleService apArticleService;

    /**
     * 生成静态文件上传到minIO中
     */
    @Async
    @Override
    public void buildArticleToMinIO(ApArticle apArticle, String content) {
        if (StrUtil.isEmpty(content)) {
            return;
        }
        //文章内容通过freemarker生成html文件
        Template template;
        StringWriter out = new StringWriter();
        try {
            template = configuration.getTemplate("article.ftl");
            //数据模型
            Map<String, Object> contentDataModel = new HashMap<>();
            contentDataModel.put("content", JSONArray.parseArray(content));
            //合成
            template.process(contentDataModel, out);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //把html文件上传到minio中
        InputStream in = new ByteArrayInputStream(out.toString().getBytes());
        String path = fileStorageService.uploadHtmlFile("", apArticle.getId() + ".html", in);

        //修改ap_article表，保存static_url字段
        apArticleService.update(Wrappers.<ApArticle>lambdaUpdate()
                .eq(ApArticle::getId, apArticle.getId())
                .set(ApArticle::getStaticUrl, path));
    }

}
